diff --git a/app/appearance/themes/daylight/theme.css b/app/appearance/themes/daylight/theme.css
index 9c332063154..5670fdc36d4 100644
--- a/app/appearance/themes/daylight/theme.css
+++ b/app/appearance/themes/daylight/theme.css
@@ -41,6 +41,7 @@
     /* 线条 */
     --b3-border-color: var(--b3-theme-surface-lighter);
     --b3-border-radius: 6px;
+    --b3-border-radius-s: 3px;
     --b3-border-radius-b: 12px;
 
     /* 滚动条 */
diff --git a/app/appearance/themes/midnight/theme.css b/app/appearance/themes/midnight/theme.css
index 49e5c386062..852f68a6646 100644
--- a/app/appearance/themes/midnight/theme.css
+++ b/app/appearance/themes/midnight/theme.css
@@ -40,6 +40,7 @@
     /* 线条 */
     --b3-border-color: #363636;
     --b3-border-radius: 6px;
+    --b3-border-radius-s: 3px;
     --b3-border-radius-b: 12px;
 
     /* 滚动条 */
diff --git a/app/src/assets/scss/business/_av.scss b/app/src/assets/scss/business/_av.scss
index 8ee250a9f3e..f6c49351699 100644
--- a/app/src/assets/scss/business/_av.scss
+++ b/app/src/assets/scss/business/_av.scss
@@ -322,7 +322,7 @@
         left: 2px;
         right: 2px;
         bottom: 2px;
-        border-radius: 3px;
+        border-radius: var(--b3-border-radius-s);
         box-shadow: 0 0 0 2px var(--b3-theme-primary-lighter);
         pointer-events: none;
       }